/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.dubbo.annotation;

import javax.lang.model.element.Element;
import java.lang.annotation.Annotation;
import java.util.Set;

/**
 * Represents an annotation processing handler, which is invoked by DispatchingAnnotationProcessor.
 */
public interface AnnotationProcessingHandler {

    /**
     * Set the annotations that this handler will handle.
     *
     * @return annotations to handle
     */
    Set<Class<? extends Annotation>> getAnnotationsToHandle();

    /**
     * Formal processing method.
     *
     * @param elements the elements that annotated by the annotations of getAnnotationsToHandle()
     * @param annotationProcessorContext the annotation processor context object (Javac object encapsulation)
     */
    void process(Set<Element> elements,
                 AnnotationProcessorContext annotationProcessorContext);
}
